<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
			var a=0;
			for(var i=1;i<=100;i++){
				a+=i;
			}
			document.write(a);
		</script>
		
	</body>
</html>
